2000, David Greenberg, Avoiding Death by PowerPoint, 45 Proven Strategies to Breathe Life Into Dull Presentations, Goldleaf Publications, →ISBN, illustrated.

The operations are necessarily algebraic, because the relative magnitudes of the given quantities and the quantity sought for are unknown; and it is the essential principle of abstract algebra to furnish rules and symbols of operation which are proper for calculating independently of the knowledge of relative magnitudes.

[…] but there were many ladies, he remarked, in ample domino costume, whose cloak and short black mask, with its border of crape, could not conceal a stray tress or dimpled chin.

Only the supernaturalism , the un[-]understandableness, of the human soul and mind.